Engine #1 acted as designed and expected when it’s control signaling was lost. It’s supposed to keep doing what it was last told to do. It was normal for it to have to be shut down on the ground by “drowning” it.
It is far better for the engine to keep providing thrust than to shut down if it loses it’s signaling in flight.
This is an intentional design feature.
It’s unsafe to have anyone walk up to the engine to hit a button on the ground, and unsafe to try to drain the fuel off. So, you stand off and drown it.
Interesting post. I wonder if any heads will roll at Rolls over this..sorry.